<form id="form1" name="form1" method="post" action="" enctype="multipart/form-data">
<input name="filename" id="filename" type="file" size="50" />
<br>
<input name="waterfilename" id="waterfilename" type="file" size="50" />
<input name="ok" type="submit" value="ok" />
</form>
<input name="demo" type="image" src="{$imagesrc}" />
<input name="demo" type="image" src="{$waterimagesrc}" />